IRTUM – Institutional Repository of the Technical University of Moldova

Browsing Articole din publicaţii internaţionale by Title

Browsing Articole din publicaţii internaţionale by Title

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  • Optical properties of CuGa3Se 5 single crystals 
    LEVCENKO, S.; SYRBU, N. N.; NATEPROV, A.; ARUSHANOV, E.; MERINO, J. M.; LEÓN, M. (IOP Publishing, 2006)
    Single crystals of CuGa3Se5 have been grown by chemical vapour transport. Optical properties of CuGa3Se5 have been investigated in the temperature range between 10 K and room temperature 300 K. The temperature dependence ...
  • Optical properties of monocrystalline CuIn5Se8 
    LEVCENKO, S.; SYRBU, N. N.; ARUSHANOV, E.; TEZLEVAN, V.; FERNÁNDEZ-RUIZ, R.; MERINO, J. M.; LEÓN, M. (American Institute of Physics, 2006)
    Single crystals of CuIn5Se8 have been grown by chemical vapor transport. The crystals show a deviation from stoichiometry. The temperature dependence of their optical absorption spectra was investigated in the temperature ...
  • Optical properties of Sm-doped ceria nanostructured films grown by electrodeposition at low temperature 
    URSAKI, V. V.; LAIR, V.; ŻIVKOVIĆ, L.; CASSIR, M.; RINGUEDÉ, A.; LUPAN, O. (ELSEVIER, 2012)
    Nanostructured undoped and samarium doped ceria thin nanocolumnar films are electrodeposited onto (FTO) glass substrates at low-temperature (30°C) with a subsequent thermal annealing at 600°C for 1h. Films are obtained ...
  • Optical properties of Tl3SbS3 acousto-optic crystals 
    SYRBU, N. N.; DOROGAN, V. V.; NEMERENCO, L. L.; VIERU, T. S. (American Institute of Physics, 2006)
    Optical properties of acousto-optical material Tl3SbS3 were investigated at the fundamental absorption edge. The basic (n=1) and excited (n=2, 3) exciton states were obtained from the λ-modulated reflection spectra for ...
  • Optical properties of ZnO nanowire arrays electrodeposited on n- and p-type Si(111): Effects of thermal annealing 
    LUPAN, O.; PAUPORTÉ, Th.; TIGINYANU, I. M.; URSAKI, V. V.; HEINRICH, H.; CHOW, L. (ELSEVIER, 2011)
    Electrodeposition is a low temperature and low cost growth method of high quality nanostructured active materials for optoelectronic devices. We report the electrochemical preparation of ZnO nanorod/nanowire arrays on ...
  • Optical reflectance studies of highly specular anisotropic nanoporous (111) InP membrane 
    STEELE, J. A.; LEWIS, R. A.; SIRBU, L.; ENACHI, M.; TIGINYANU, I. M.; SKURATOV, V. A. (IOP Publishing, 2015)
    High-precision optical angular reflectance measurements are reported for a specular anisotropic nanoporous (111) InP membrane prepared by doping-assisted wet-electrochemical etching. The membrane surface morphology was ...
  • Optical spectra and electroabsorption of CdP2 and CdP4 single crystals 
    RADAUTSAN, S. I.; SYRBU, N. N.; TESLEVAN, V. E.; CHUMAK, I. V. (WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim, 1973)
    The anisotropy of the absorption and electroabsorption spectra of CdP2 and CdP4, single crystals has been investigated. A number of interband gaps has been determined and specified. The energies and the type of phonons ...
  • Optical spectra and energy band structure of AgAsS2 crystals 
    STAMOV, I. G.; SYRBU, N. N.; URSAKI, V. V.; PARVAN, V. (ELSEVIER, 2012)
    Ground and excited states of three exciton series are observed in the region of fundamental absorption edge of AgAsS2 crystals. The contours of exciton reflection spectra are calculated and the main parameters of excitons ...
  • Optical spectra and energy band structure of single crystalline CuGaS2 and CuInS2 
    LEVCENKO, S.; SYRBU, N. N.; TEZLEVAN, V. E.; ARUSHANOV, E.; DOKA-YAMIGNO, S.; SCHEDEL-NIEDRIG, Th.; LUX-STEINER, M. Ch. (IOP Publishing, 2007)
    The reflection spectroscopy of chalcopyrite CuGaS2 and CuInS2 single crystals has been applied for light polarized perpendicular () and parallel () to the optical axis in the photon energy range between 1.5 and 6 eV at 77 ...
  • Optical spectra and energy band structure of single crystalline CuGaS2 and CuInS2 
    SOBOLEV, V. V.; SYRBU, N. N. (WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim, 1972)
    The anisotropic spectra of edge absorption, reflection, and photoconductivity of the monoclinic ZnP2, and ZnA2, crystals have been experimentally investigated at 293 and 77 °K. The group-theoretical calculations of selection ...
  • Optical spectra in the region of exciton resonances in quantum wells and quantum dots of In0.3Ga0.7As/GaAs heterostructures 
    SYRBU, N. N.; DOROGAN, V.; DOROGAN, A.; VIERU, T.; URSAKI, V. V.; ZALAMAI, V. V. (ELSEVIER, 2012)
    The transparency, reflection and luminescence spectra of In0.3Ga0.7As structures with 8nm thickness and quantum wells limited by the barrier layer GaAs of a 9nm (upper layer) and 100nm (bottom layer) thickness had been ...
  • Optical spectra of TlGaS2 crystals 
    NEMERENCO, L.; SYRBU, N. N.; DOROGAN, V.; BEJAN, N. P.; ZALAMAI, V. V. (Elservier, 2016)
    Wavelength modulated reflection spectra measured at temperatures 14K and 300K in E||a and E||b polarizations for TlGaS2 crystals were investigated. The ground and excited states of excitons B2u in E||a polarization and B3u ...
  • Optical-electronic moments feature-based recognition system controlled by parameters of the input images 
    PERJU, Veacheslav L.; CASASENT, David P.; PERJU, Veacheslav V.; ZAVROTSCKI, Serghei N. (SPIE, 2003)
    The new methods of invariant pattern recognition (IPR), based on the effective calculation of image moment features are presented. It is described the special purpose multiprocessor computer system, which realizes the ...
  • Optical-electronic multiprocessors computer systems controlled by input images parameters 
    PERJU, Veacheslav L.; CASASENT, David P. (SPIE, 2005)
    We present a new class of optical-electronic reconfigurable image processing systems, controlled by the parameters of the input image. The systems use multiprocessors and are distributed. We describe two different optical ...
  • Optical-electronic pattern recognition system based on the image's logarithmic chord transformation method 
    PERZHU, Veacheslav L.; QURAU, Adrian V.; SARARICIUC, Dorian I. (International Society for Optics and Photonics (SPIE), 1997)
    A new kind of the image representation - logarithmic hord transformation of the images (LHTI) is suggested. A structures of an optical-electronic processor, performing operation of LHTI and of an image processing computer ...
  • Optical-electronic systems for the fingerprints ' recognition 
    PERJU, Veacheslav L.; CASASENT, David P.; PERJU, Veacheslav V.; SARANCIUC, Dorian I. (Society of Photo-Optical Instrumentation Engineers (SPIE), 2019)
    There are presented the structures of the special purpose mono-channel and multi-channel optical-electronic systems and are described computing processes in the systems at the realization of the different fingerprints ...
  • Optical-electronic technologies in materials analysis 
    PERJU, Veacheslav L.; CASASENT, David P.; FESHCHENKO, Valeriy S.; FESHCHENKO, Lubov V. (SPIE, 2005)
    It is proposed a new optical electronic approach for effective, simple and non expensive testing of the materials. An optical correlator is used for high speed features extraction, which characterize the distribution of ...
  • Optimal Control System Synthesis Based on Multi-controllers Architecture 
    ABABII, Victor; BALMUS, Ion; CEBAN, Gheorghi; MELNIC, Radu (Stefan cel Mare University of Suceava, Romania, 2012)
    This paper offers a solution to the problem of optimal control system synthesis based on uniform multicontroller architecture. For this purpose the equations that describe the control system are decomposed into a set of ...
  • The optimal dimensional design of machining technologies 
    TOCA, Alexei; STRONCEA, Aurel; STÎNGACI, Ion; RUȘICA, Ion (EDP Sciences, 2018)
    The paper discusses the design methodology of optimal technological processes of machining, bearing in mind that these processes are related to discrete processes. Discreteness is manifested at different levels: the process ...
  • Optimal solution of weak spots problem in a grid system by means of facts devices 
    RADILOV, Tudor (University of Craiova, 2011)
    Electrical power system functioning is permanently exposed to different disturbances which cause the regime parameters change. Every grid system contains elements whose regime parameters variations influence system’s ...

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